Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bdf75f1bc5fca4b…

MALICIOUS

PDF

92.6 KB Created: 2021-06-27 08:37:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 4dfa82d409adea144a96ddbbea97b6bf SHA-1: c983dd55c11d328d227e181157548ecc34cf040f SHA-256: 3bdf75f1bc5fca4b7436390d3f4f15637e73102c993db6291dbc7d0974e28c08
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links pointing to compromised WordPress installations and other potentially malicious domains, indicating a phishing or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lure users to download further malware or engage in fraudulent activities. No scripts were extracted, but the extensive link farm is sufficient evidence of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://garglob.ru/uplcv?utm_term=introduction+to+gui+in+java PDF link annotation
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bd02e8efcf4---53775328083.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/tamiropanoragexezajusuv.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a791c0b6deb---66009951226.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c14219f93---wipevujupoleru.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/41672705031.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a0c575a4b---77693326420.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/6216q6i55cttpo6tah86mrupp4/wuwad.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821ba24a215---45571815913.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/91664315409.pdfIn PDF document text
    • http://pvhs1980reunion.com/clients/e/e5/e5e9f74eb83211af097e98bf68d59c4c/File/37567787529.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092abd89dde8---1453017258.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abe1d77adda---mudubirarijos.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b87ad38f780---5312665432.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b12333a68a5---wodusemabujizux.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/firewatila.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8c94166f3---xojejotekugepasowakeba.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/22e2a56c7f0dddef1e00d8306a33bc0e/dikaxigokikobimila.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/dipodapabosolusogalapaxaw.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/xaviwifegevuketoragawe.pdfIn PDF document text
    • http://anjilh.com/uploadfile/file///2021043021520066.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/ebf86ca45fe23d3d98c3d5c896d42886/44014796964.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10834 17256 bytes
SHA-256: a3a0d412df5d53d1027a3e0387b0aac7839fd68ad61c281b7fa0c9ba52a58557
font_01_sfnt_off00013599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13599 10444 bytes
SHA-256: b0073afb8e0ae0d0a044c2421242318230965abce11993bea759a4307218f1c9
font_02_sfnt_off00014d2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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